72049

Sodium thiosulfate

purum p.a., anhydrous, ≥98.0% (RT)

• Linear Formula: Na₂S₂O₃
• CAS Number: 7772-98-7
• Molecular Weight: 158.11
• EC Number: 231-867-5
• MDL number: MFCD00003499
• UNSPSC Code: 12352302
• PubChem Substance ID: 329763718
• NACRES: NA.21
• form: crystals

Properties

• Quality Level: 200
• grade: purum p.a.
• Assay: ≥98.0% (RT)
• form: crystals
• pH: 6.0-8.5 (25 °C, 50 mg/mL in H₂O)
• anion traces: sulfide (S^2-): ≤50 mg/kg
• cation traces: Ca: ≤50 mg/kg; Cd: ≤50 mg/kg; Co: ≤50 mg/kg; Cu: ≤50 mg/kg; Fe: ≤50 mg/kg; K: ≤500 mg/kg; Ni: ≤50 mg/kg; Pb: ≤50 mg/kg; Zn: ≤50 mg/kg
• SMILES string: [Na+].[Na+].[O-]S([O-])(=O)=S
• InChI: 1S/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2
• InChI key: AKHNMLFCWUSKQB-UHFFFAOYSA-L

Description

General description

The product is anhydrous sodium thiosulfate (Na₂S₂O₃). It can be obtained from Na₂S₂O₃.10H₂O by heating above 100°C. It can be synthesized from sodium sulfate.

Application

Sodium thiosulfate (Na₂S₂O₃) may be used in the following studies:

• Industrial synthesis of methylene blue.
• Quantitative estimation of elemental iodine by titrimetry.
• Detection of trace levels of cysteine by employing triangular silver nanoplates (TAg-NPs).

Safety Information

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable